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MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY
Lu, J. G.1,2; Du, Y. J.3; Hao LF(郝龙飞)4; Yan, Z.5; Liu, Z. Y.6; Lee, K. J.7; Qiao, G. J.2; Shang, L. H.8,9; Wang, M.4; Xu, R. X.1,2,7; Yue, Y. L.; Zhi, Q. J.8,9; Lu, JG (reprint author), Peking Univ, State Key Lab Nucl Sci & Technol, Beijing 100871, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2016-01-10
卷号916页码:2
DOI10.3847/0004-637X/816/2/76
产权排序第4完成单位
收录类别SCI
关键词Acceleration Of Particles Pulsars: General Pulsars: Individual (Psr b1133+16) Radiation Mechanisms: Non-thermal
摘要The pulse profile of PSR B1133+16 is usually regarded as a conal double structure. However, its multi-frequency profiles cannot simply be fitted with two Gaussian functions, and a third component is always needed to fit the bridge region (between two peaks). This would introduce additional, redundant parameters. In this paper, through a comparison of five fitting functions (Gaussian, von Mises, hyperbolic secant, square hyperbolic secant, and Lorentz), it is found that the square hyperbolic secant function can best reproduce the profile, yielding an improved fit. Moreover, a symmetric 2D radiation beam function, instead of a simple 1D Gaussian function, is used to fit the profile. Each profile with either well-resolved or not-so-well-resolved peaks could be fitted adequately using this beam function, and the bridge emission between the two peaks does not need to be a new component. Adopting inclination and impact angles based on polarization measurements, the opening angle (theta(mu)0) of the radiation beam in a certain frequency band is derived from beam-function fitting. The corresponding radiation altitudes are then calculated. Based on multi-frequency profiles, we also computed the Lorentz factors of the particles and their dispersion at those locations in both the curvature-radiation and inverse-Compton-scattering models. We found that the Lorentz factors of the particles decrease rapidly as the radiation altitude increases. Besides, the radiation prefers to be generated in an annular region rather than the core region, and this needs further validation.
项目资助者National Basic Research Program of China (973 program)(2012CB821800) ; talent team of science and technology innovation in Guizhou Province((2015) 4015) ; National Natural Science Foundation of China(11373011,11303069,11225314,11103021,11565010,11165006)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
WOS记录号WOS:000368238500028
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]INVERSE COMPTON-SCATTERING ; GAMMA-RAY EMISSION ; PULSAR EMISSION ; FREQUENCY-DEPENDENCE ; ANNULAR GAP ; EMPIRICAL-THEORY ; CRAB PULSAR ; ICS MODEL ; BEAMS ; CORE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9399
专题射电天文研究组
通讯作者Lu, JG (reprint author), Peking Univ, State Key Lab Nucl Sci & Technol, Beijing 100871, Peoples R China.
作者单位1.State Key Laboratory of Nuclear Science and Technology, Peking University, Beijing 100871, China
2.School of Physics, Peking University, Beijing 100871, China
3.Qian Xuesen Laboratory of Space Technology, Beijing 100094, China
4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
5.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
6.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
7.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
8.School of Physics and Electronic Science, Guizhou Normal University, and NAOC-GZNU Center for Astronomy Research and Education, Guiyang, Guizhou 550001, China
9.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
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Lu, J. G.,Du, Y. J.,Hao LF,et al. MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY[J]. ASTROPHYSICAL JOURNAL,2016,916:2.
APA Lu, J. G..,Du, Y. J..,郝龙飞.,Yan, Z..,Liu, Z. Y..,...&Lu, JG .(2016).MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY.ASTROPHYSICAL JOURNAL,916,2.
MLA Lu, J. G.,et al."MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY".ASTROPHYSICAL JOURNAL 916(2016):2.
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